Question

A given substance is a white solid at 250C. It melts at 1500C without decomposing, and the melt does not conduct an electric current. What would be the classification of the substance, based on this information?

Answer 1

Answer:

The substance can be best classified as a molecular substance

Explanation:

The given information are;

The physical state of the substance at 25°C = Solid state

The physical state of the substance at 150°C = Molten

Molecular substances are those with bonds formed by electron sharing among the constituent atoms and they contain a few number of atoms per molecule. Molecular compounds with molecular weight less than 100, usually exist as liquids or gases at room temperature, while those with molecular weights over 100 can be found in a solid state at room temperature.

Generally, molecular compounds are usually volatile and have a melting point less than 300°C

Therefore, the substance can be best classified as a molecular substance.